Hagel tours last Cold War frontier in Korea
South Korean Defense Minister Kim Kwan-jin (right) points out a location in North Korea to US Secretary of Defense Chuck Hagel during a tour of the Demilitarized Zone that separates the Korean peninsula in Panmunjom, on September 30, 2013
"There is no margin of error up here," Hagel told reporters at the heavily fortified Demilitarized Zone (DMZ) that still separates the two Koreas 60 years after the end of the Korean War.
Hagel was on the first leg of a trip to South Korea and Japan -- two key regional military allies with a major stake in the battle to halt Pyongyang's nuclear weapons programme.
His visit follows signs that North Korea may be expanding its weapons-grade fissile material output even while calling for the resumption of six-party denuclearisation talks.
After watching a live-fire exercise near the border, Hagel toured the DMZ -- once described by former US president Bill Clinton as the "scariest place on earth" -- with his South Korean counterpart Kim Kwan-Jin.
"This is probably the only place in the world where we have always a risk of confrontation, where two sides are looking clearly and directly at each other," he told reporters at the Panmunjom truce village where the Korean War armistice was signed.
Hagel and Kim are due to hold talks on Tuesday which are likely to focus on Seoul's request for an extension of US wartime command over South Korean troops.
In the event of war with North Korea, the alliance currently calls for the US military commander to lead the 28,500 US troops deployed to the country, as well as South Korea's 640,000-strong force.
South Korea had agreed to take over wartime operational command of all troops starting in 2015, a decision that was already delayed from a 2012 target date.
South Korean defence policymakers now say they need more time to prepare for the transition, citing increased military threats from the North after it held a nuclear test in February.
"Currently, peace on the Korean peninsula is once again precarious because of the North's nuclear programme," President Park Geun-Hye said at a dinner function with Hagel later Monday.
The command issue is a divisive one in South Korea.
Left-leaning opposition parties view the existing command structure as quasi-colonial and tend to favour a rapid transition.
Some right-wing hardliners also perceive a slight to national pride, but the conservative establishment sides with the belief that US command is the best guarantee of its long-term commitment to South Korea's defence.
US officials have reaffirmed the 2015 schedule and, in a briefing to reporters on his flight to Seoul, Hagel noted that the South Korean military had become "much more sophisticated, much more capable" over the past 10 years.
And while stressing it was too early to make a "final decision", Hagel said it was inevitable that time would bring change to the dynamics of the military partnership.
"Even though our alliance has never been stronger than it is today, that does not mean we cannot grow and mature," he said at the dinner with President Park.
The visit to the DMZ had been a "chilling reminder of the threat North Korea poses not only to this country, but to the region, and to the United States homeland as well," he added.
Tensions on the Korean peninsula, which sky-rocketed after the nuclear test, have eased a little in the past month, but concerns over Pyongyang's nuclear ambitions remain acute.
Analysis of recent satellite images suggest it has restarted the plutonium reactor that provided the fissile material for at least two of its three nuclear tests, and may have doubled its uranium enrichment capacity at the Yongbyon nuclear complex.
Hagel said the recent use of chemical weapons in Syria and the international community's response had been closely followed by officials in Seoul.
"The South Koreans are very concerned because the North Koreans possess a very significant stockpile of chemical weapons," he said.
North Korea and its main ally China have both urged a resumption of six-party talks on the North's nuclear programme, but Washington and Seoul insist Pyongyang must demonstrate a commitment to denuclearisation before any substantive dialogue can be held.
The six-party process, which the North exited in 2009, involves the two Koreas, China, Japan, Russia and the United States.
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